We'll get this out of the way at the beginning: I am still wet behind the ears/green/newbie etc... with actually using CV gate connections. There. I said it!

I just got a little brother to use with my axxe and am humbling pulling out my hair right now: please pardon my ignorance being new to this and such. So the little bro powers up fine, but that's about all. my understanding is I hook up Axxe CV out to LB CV in. I've also run the audio output from the LB to the ext audio in on the axxe. Press a key...and nothing. Am I missing a basic fundamental step in connections or do I truly have a DOA little brother?

I know it's probably basic to some, but apparently not to me any help is really very appreciated!

"I slid some sliders but like no sound came out, I just want to make Tool or NIN or whatever. That's why I'm selling it to you."

With CV,GATE and TRIG IN all hooked up you should hear the oscillator at the audio output (although I'm not sure why it would use the trigger with no EG). Try checking the voltage rails on the power supply.

Thanks for the help guys, I am fairly certain my axxe is sending- when I hook it up to my omni 2 it triggers, so that's a good sign.. I don't hear the osc through the audio on the LB though. How would I go about checking the voltage rails? (I'm assuming I have to open the LB up) would it make a difference if I plug the LB audio through a different amp instead of just running it through the aux audio input on the axxe?

Thanks again for helping me troubleshoot, I do appreciate it.

"I slid some sliders but like no sound came out, I just want to make Tool or NIN or whatever. That's why I'm selling it to you."

Sure, it could be a problem with the axxe so try plugging the audio into another input. For checking the voltage from the power supply, you'll need a multi-meter or an oscilloscope. If it is in fact broken, usually due to shorted tantalum blocking caps, you'll need a soldering iron to fix it. These are all good tools to have around if you're wielding an arsenal of 30 year old bad-ass synths, which it sounds like you happen to be Other likely suspects could also be the CA3086 transistor array, or the 1458 in the VCA, or worse case scenario you'll need a new 4027-1 VCO module that synthrestore.co.uk sells.